[MAIPC] Summer Invasives.

Sun Aug 28 04:13:26 PDT 2016

What are some of the pre-emergent herbicides you have used?

Cary Hulse
Senior Urban Forester
Wetland Studies and Solutions, Inc.
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Direct: (703) 679-5715
Cell: (571) 436-6149
chulse at wetlandstudies.com<mailto:chulse at wetlandstudies.com>
www.wetlandstudies.com<http://www.wetlandstudies.com/>

"Helping our clients to make trees part of the plan"

From: MAIPC [mailto:maipc-bounces at lists.maipc.org] On Behalf Of Ellis, Michael
Sent: Saturday, August 27, 2016 10:11 PM
To: Art Gover <aeg2 at psu.edu>; Stephen Hiltner <stevehiltner at gmail.com>
Cc: maipc at lists.maipc.org
Subject: Re: [MAIPC] Summer Invasives.

Good to hear from you Art,

Have you compared quizalofop-P with clethodim in your work?  I've had great success with clethodim this year at two of our parks against Microstegium, even in August.

I noticed at the low rate I was applying clethodim, it wasn't killing Dicantheliums, but was impacting Leersia virginica. We are all growing very concerned Microstegium's success at dramatically increasing populations annually despite time consuming control efforts each year.  At this point it is colonizing rare habitats that we thought we could keep it out of if we managed it every year, such as our Magnolia bogs.

I personally have all but abandoned trial attempts to manage Oplismenus undulatifolius with grass specific or pre-emergent herbicides. Although both work very well at killing or preventing first year plants, the second year Oplismenus plants are harder to manage.

Regards,

Michael Ellis
Non-Native Invasive Plant Management Field Coordinator
Park Ranger Office, Natural and Historical Resources Division
The Maryland-National Capital Park and Planning Commission
weedwarriors at pgparks.com<mailto:weedwarriors at pgparks.com>

240-429-5042

_____________________________
From: Art Gover <aeg2 at psu.edu<mailto:aeg2 at psu.edu>>
Sent: Saturday, August 27, 2016 9:51 PM
Subject: Re: [MAIPC] Summer Invasives.
To: Stephen Hiltner <stevehiltner at gmail.com<mailto:stevehiltner at gmail.com>>
Cc: <maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>>

We use the selective grass herbicide quizalofop-P (e.g. "Assure II") at its lowest labeled rate, and find that stiltgrass is controlled while other grasses such as Leersia virginica, Muhlenbergia scherberi, and Brachyelytrum erectum are not affected, nor any dicots or non-grass monocots.

Be well.

Art

Penn State Wildland Weed Management
116 ASI Building
University Park, PA 16802

(814) 863-9904
(814) 863-7043 FAX
http://plantscience.psu.edu/wildland

> On Aug 27, 2016, at 11:17, Stephen Hiltner <stevehiltner at gmail.com<mailto:stevehiltner at gmail.com>> wrote:
>
> Sorry to hear. Perhaps development of a C4 pathway specific herbicide would help, since stiltgrass is said to be one of the few C4 species that grows in the shade? Googling brings up a few results--more than would come up a few years ago.
>
> On Sat, Aug 27, 2016 at 10:53 AM, MarneyB <marneyb at earthlink.net<mailto:marneyb at earthlink.net>> wrote:
> On a walk recently on the River Trail at Great Falls MD I noticed that Golden ragwort - Packera aurea - was able to deter Japanese Stiltgrass in an area where this invasive and had taken to a large extent.
>
>
>
> Marney
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> From: MAIPC [mailto:maipc-bounces at lists.maipc.org] On Behalf Of Marc Imlay
> Sent: Saturday, August 27, 2016 9:39 AM
> To: maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>
> Subject: [MAIPC] Summer Invasives.
>
>
>
> I have found this year that the Japanese Stiltgrass is no longer controllable over 400 acres of parkland in spites of extensive use of pre-emergents in March. At the 200 acre Swann Park beefsteak is no longer controllable. And many folks have found the same for Wavyleaf basketgrass. . Twenty years ago it was very doable to save all our parks. So mid-late Summer invasives is very sad, especially since stiltgrass is so totally destructive and replaces the other ground vegetation.
>
>
>
> I remind myself that I have been successful with invasives for the rest of the year including garlic mustard and Lesser Celandine. For the late Summer invasives , biological control remains our best hope, both effective host specific from Eurasia, etc. as well as waiting for native biological controls to pop up as with Ailanthus after 200 years. .
>
>
>
> From: Imlay, Marc
> Sent: Thursday, August 25, 2016 10:08 AM
> To:
> Subject: RE: Mniutes from August 2016 board meeting
>
>
>
> A top issue for invasive plant control folks is should we continue to remove all the Asiatic bittersweet, bush honeysuckle, juvenile garlic mustard, Japanese barberry, porcelain berry, beefsteak, multi flora rose, mimosa, wineberry, and mile-a minute. Or switch our resources to Japanese Stilt grass and wavyleaf basket grass that have become so much more abundant and destructive at our high priority sites.
>
>
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>
>
> Marc Imlay, PhD, Chair, MAIPC Biological control working Group Conservation biologist,
>
> Park Ranger Office, Non-native Invasive Plant Control coordinator. Marc.Imlay at pgparks.com<mailto:Marc.Imlay at pgparks.com>
>
> (301) 442-5657 cell Natural and Historical Resources Division
>
> The Maryland-National Capital Park and Planning Commission
>
>
>
> Marc Imlay, PhD
> Chair of the Biodiversity and Habitat Stewardship Committee for the Maryland Chapter of the Sierra Club.
>
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>
> <image001.jpg>
>
> Virus-free. www.avast.com<http://www.avast.com>
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